A 16-year-old student was arrested Thursday on suspicion of making threats against Chandler High School.

Chandler police said they were notified by the school of the possible threat on Wednesday.

Chandler High School sent out a letter to parents about the possible threat. In the letter, Principal Larry Rother said a male student was identified and the disciplinary action was being taken by school officials and police.

Police arrested the teen on suspicion of plotting to use explosives and firearms, officials said. Police and school officials did not provide specific details about how the threat became known.

The teen did not carry out the threat and police do not know how long the plan was in place, officials said.

Reporter Kaila White talks with two Phoenix-area high school students who are helping to organize a March for our Lives event on March 24, 2018, in Phoenix. They answer the question: Is gun violence a mental-health issue?

Chandler Police Department spokesman Sgt. Daniel Mejia said three firearms were seized from the boy's home but they did not belong to him.

Police do not have enough evidence to support that those weapons would be used to carry out the threat, Mejia said.

The teen is a Chandler resident and a Chandler High School student, Mejia confirmed. He made statements to detectives that corroborated his involvement, police said.

The teen was booked into the Maricopa County Juvenile Detention Center on one count of terrorism, police said.